Cyclopenta[7,8]phenanthro[1,2-c]quinolizine,6,7,7a,7b,8,9,9a,10,11,12,12a,12b,13,14,14a,15-hexadecahydro-7a,9a-dimethyl-,[7aR-(7aa,7bb,9aa,12ab,12ba)]-